/**
 * ============================================
 * Loading Skeletons - Professional Design
 * ============================================
 * 
 * Skeleton loaders for better loading experience
 * Features:
 * - Smooth animations
 * - Responsive design
 * - Multiple skeleton types
 * - Accessible
 */

/* ============================================
   Skeleton Base
   ============================================ */
.ep-skeleton {
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 0.5rem;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}


/* ============================================
   Product Card Skeleton
   ============================================ */
.pg-product-skeleton {
    background: #ffffff;
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.pg-product-skeleton-image {
    width: 100%;
    padding: 2rem;
    min-height: 200px;
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.pg-product-skeleton-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.5) 50%,
        transparent 100%
    );
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.pg-product-skeleton-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.pg-product-skeleton-title {
    height: 1.5rem;
    width: 60%;
    border-radius: 0.375rem;
}

.pg-product-skeleton-size {
    height: 2.5rem;
    width: 100%;
    border-radius: 0.5rem;
}

.pg-product-skeleton-actions {
    display: flex;
    gap: 0.75rem;
}

.pg-product-skeleton-btn {
    height: 2.75rem;
    flex: 1;
    border-radius: 0.5rem;
}


.filter-skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .filter-skeleton-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .filter-skeleton-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.75rem;
    }
}

/* ============================================
   Fade Out Animation
   ============================================ */
@keyframes fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.ep-skeleton-fade-out {
    animation: fade-out 0.3s ease forwards;
}

/* ============================================
   Reduced Motion Support
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .ep-skeleton,
    .pg-product-skeleton-image::after {
        animation: none;
    }
    
    .ep-skeleton {
        background: #f0f0f0;
    }
}